Beat the fat until frothy. Add sugar and vanillin sugar and mix. Separate eggs. Gradually add the egg yolks to the fat-sugar mixture, whip until creamy. Mix flour and baking powder, stir in.
Add milk. Grease a springform pan (26 cm Ø). Fill in half of the dough. Beat the egg white until stiff, add icing sugar. Spread half on the dough in the form. Bake in the preheated oven (electric oven: 175 °C/ gas: level 2) for about 30 minutes, let cool off.
Bake the second base in the same way. Soak the gelatine. Wash and clean the strawberries. Puree the strawberries, sugar and lemon juice. Squeeze the gelatine, dissolve. Stir into the purée. Whip cream and vanilla sugar until stiff.
As soon as the puree gels, fold in the cream. Place a cake base on a plate, close the edge of the springform pan around it, spread the cream on the base. Place the second cake layer on top and press it down. Chill the cake.
Remove from the mould edge. Dust with icing sugar and decorate. Results in about 16 pieces.